Blood-testing device



June 7, 1927.

I n C. E. RODERICK BLooD TESTING DEVICE Filed April 20. 1925 Y IINVENTOR `Charles E. derick Bfww Patented June 7, 1927.

. ""Biiooniirns'rne niiivionf4 Application mea April 2o, i925'. serialNo. 24,569. 1

provide a device ofthe `class described which A is very compactxandi maybe repeatedly used,

the gauge or scale Aindicia being elfectivelyv protected. f

Objects pertaining vto 'details and econo- .mies of my invention willdefinitely appear from. the detailed description to follow.

`Ifaccomplish the objects'of my invention by Kthe devices and meansdescribed vin t'he Vfollowing' specification. The invention is'clearly'.deined and pointed out in the claims.

' A 'structure w'hich embodies the features of my invention is AclearlyVillustrated. in the j .accompanying drawing forming a partf'otrespondingto line 7 7 of Figs. IV and VI.

this application, in which: v Fig. Iis a front'viewofmy improvedblood-testing device with a specimen mounted therein. l Y l j Fig. IIisa. sectionon a line corresponding to line 2 2 of Fig. III.

Fig. III is an end view right of Figs. I and II. l

Fig. IV is a front elevation 'of a modified form or embodiment of myinvention.`

Fig. V is a. front view of the casing and drum of the embodiment vshowninv Fig. IV disassembled. y Y

Fig. VI is a section on a line correspond ing to line 6 6 of Figs.IV-and VII. f

Fig. VII is a detail section'on a line corlooking from the Fig. VIII isav plan View ot' the gauge vstrip extended,r no attempt being made toshow the color scale.

In the drawing the sectional views are taken looking in the direction ofthe little arrows at the ends of the section'lines and similar numeralsofzreference indicate similar parts throughout the several views.

My vinvention as shown in Figs. I, II and III comprises a cylindricalcasing member 1 having an end wall 2 provided with a hub 3. This casinghas a sight opening 4, preferably V shaped at its lower end. Rotatablymounted within this casing is a drum 5 having a peripheral channel 6.This drumhas an end 7 carrying the spindle 8 disposed' vwithin-the hub3. The knurle-d finger piece 9 is threaded into the hub actingas a re-Ling t'he drum.V

A vgauge strip V1() is arranged withinther channel of tliedrum and isprovided with ay series of colored portions 11 of different'.

taining means and also as a means for rotateVv 1 FFME-1 1' r oiiAnLnsnfnonnniox, or' BATTLE Carlini,fivirCinema. i

shades of red corresponding to the ,percent-vv ages oi hemoglobintheblood, there being ten sectionsin tlie stripf illustrated, the periconta-ges being from ten to one hundred. The different shadesareindicated in'Fig.

V,`no attempt, however, being madeto-in-V cli-cate the shades in' Fig.VVIII.

In the embodiment showninFigs. I-III the casing is provided withperipheral ribs 12 which are preferably knurled as indicated` so thattheyprovide ei'ective handhelds' for thecasing. V'Ih'eseribs haveslot's'13 disposed-tangentially and adjacent to thexside openingprovidingaspecimen holder. i

In practicel a drop yof blood to be tested is taken up by a piece 'gotabsorbentv paper j 11i of such dimensions asto be slipped 'into v theholder with the Ablood as indicated V'a'tlr adjacent the side opening.By rotating the is visible therein, thereby indicating to the user thedirection in which the drum should i be rotated for higher' or lowerpercentages..

In the embodiments shownin FigsIV .to VI, the casing 17 has a sideopening 18 therein corresponding'tot'he side opening t. knurled rib 20,t'lie casing being grasped by the knurled rib Spring'-fingei's 22ammounted on the casing to provide a specimen holder, thes'eiingers beingarranged softhat` The drum 19 is rotated by means of the Y drum thevindicia. on the gauge strip may be saiccessii'fely 'broughtY intoregister Vwith the 'f side opening in convenient position for comloo thespecimen may be supported partiallyover the side opening.

inl Figs. I, II and III. I

Myimproved blood testing device 'is vvery The operation is substantiallv the same as in the embodiment shown` compact, the gauge stripsare eiectively protected, and the device may benrepeatedly used. i IHaving thus described my invention, what I claim 'as new 4and desire tosecure by 'Letters Iatent is;

l. Ink adevice ot the classl'described, the

eon'ibiriiliionfolta pair of telescoped `cylindrical members having endwalls, the inner mem er being rotatable within the outer and providedwith afperipheral channel, the outer member being providedwithperipheralA ribs having tangentially disposed slots thereinproviding a holder, said outer member having a sight opening betweensaid ribs with one end adjacent the said holder whereby a VSnsilren iS-.Supported by die helder at .the end of the sight opening, and a gaugestrip having a series oi' ,color sections with Vpercentage indiciaVassociated therewith mount-Y ed in said channel whereby the colorsections Vmay vsuccessively brought into register with said sight-opening for comparison with the specimen snpportedin said holder. 2. Ina device of the class described, the

combination ofua pair oftelescoped cylindri-V cal members having endwalls, the inner member being rotatable within the onter, the outermember being provi-,ded with a specimen holder, said enter memberhavinga sightopening adjacent'. thev said` (holder, yand a gang-e striphaving a series of color sections with percentage indicia associatedvtherewith mounted onl said inner rn-imberA sight yopening between saidribs with one end adjacent thel said holder whereby a specimen issupported by the holder at the fend of the sight opening, and a gaugestrip `combination lof cylindrical casingmember having' a peripheralsight opening therein .and end wall provided with a central hub, a drumrotatable .within lsaid casing provided with an end wall having aspindle disposed in said hub', a linger piece on said spindle lforrotatably adjusting said drum, and a gauge strip mounted on theperiphery or said d'rurn whereby the indicia thereof may be brought intoregister with said opening, said casing being provided with peripherally ldisposed fingers' providing a specimen holder at one end oi"said opening, facilitating the coiinparison of the specimen with saidgauge strip. l.

In a device of the class described, the combination of a cylindricalcasing member havingv a peripheral sightopening therein and an end wallvprovided with a central hub, a drum rotatable within said casing pro-fvided with an end wall having a spindle disposed in said hub, a lingerpiece on saidk spindle for rotatably adjusting said drum,

and a gauge strip mounted on the 'periphery of said drum whereby theindicia thereof may be brought into register with said open; ing.

Inwitness whereof I have hereunto set my hand. Y

, CHARLES E. RoDEnroK.

